Hey all, so I am rebuilding my 1.8 APh and have run into an issue. I on;y have 2 bolts for the oil pump, but there is a third hole for a bolt near the center of the crank case. All i have read says to tighten the 2 bolts. so is the third hole a leftover from a redesign stage that does not need a bolt? I tried using one of the two bolts I have but it stops threading with about 2 mm to go and the hole is not clogged so I am a bit confused. Please advise.